Writing instrument



FIG. 1 is a perspective view of the writing instrument;

FIG. 2 is a front view of the writing instrument, the rear being a mirror image thereof;

FIG. 3 is a right side view of the writing instrument, the left side being a mirror image thereof;

FIG. 4 is a top view of the writing instrument; and,

FIG. 5 is a bottom view of the writing instrument. 

CLAIM The ornamental design for a writing instrument, as shown and described. 